In a bowl, mix glutinous rice flour, sugar, and baking powder.
Add milk, egg, and melted butter, and mix until a smooth dough forms.
Transfer the dough into a piping bag.
Pipe small balls in a circular ring shape onto parchment paper.
Heat oil in a deep pan for frying.
Carefully place the donuts into hot oil and fry until golden brown.
Remove and drain excess oil on paper towels.
Dip or drizzle with your favorite glaze and let them set before serving.